Metamorphic And Mineral

Gneiss

Gneissic Metamorphic Rock

Gneiss

Gneiss (High-grade regional metamorphic rock)

Rutilated Quartz (with Garnet pendant)

Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Lapis Lazuli (Tumbled)

Lazurite-dominated contact metamorphic rock

Pink Quartz (Rose Quartz variant)

Silicon Dioxide (SiO2)

Gneiss (with Quartz-Feldspar vein)

Gneiss (high-grade metamorphic rock) containing Quartz (SiO2) and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8)

Smoky Quartz

Smoky Quartz (SiO2)

Quartz

Quartz (SiO2)

Ruby in Zoisite with Hornblende

Anyolite (Ruby: Al2O3, Zoisite: Ca2Al3(SiO4)3(OH))

Quartz (Milky/Crystalline variety)

Silicon Dioxide (SiO2)

Quartzite

Quartzite (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Lapis Lazuli (Raw)

Lazurite-rich metamorphic rock; Na3Ca(Al3Si3O12)S

Quartzite with inclusions

Metamorphic Rock (Mainly SiO2)

Moonstone

Orthoclase Feldspar (containing Albite lamellae), (KAlSi3O8)

Blue Aventurine

Silicon Dioxide (SiO2) with inclusions of Dumortierite

Kyanite (within Quartz)

Kyanite (Al2SiO5) in crystalline Quartz base (SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)

Gneiss (River Cobble)

Gneiss (Foliated Metamorphic Rock)

Marble

Recrystallized Calcite (CaCO3)

Greenschist

Greenschist (comprising Actinolite, Chlorite, and Epidote)

Greenschist

Chlorite schist

Red Garnet (Pyrope or Almandine)

Garnet Group (A3B2(SiO4)3)

Garnet (Pyrope-Almandine series)

Garnet Group, (Mg,Fe)3Al2Si3O12

Green Aventurine

Aventurine Quartz (SiO2)

Gneiss (specifically a weathered Amphibolite or Garnet Gneiss)

Gneiss (complex silicate composition)

Blue Apatite

Fluorapatite / Chlorapatite [Ca5(PO4)3(F,Cl,OH)]

Alexandrite

Chrysoberyl (BeAl2O4 with Chromium impurities)

Granite Gneiss

Gneiss (High-grade regional metamorphic rock)

Quartzite with Chlorite/Epidote

Metamorphosed Quartzite (SiO2)

Ruby

Corundum (Al2O3 with Chromium traces)

Ruby (Corundum)

Corundum (Aluminum Oxide) with chromium trace elements, Al2O3

Amazonite

KAlSi3O8 (Potassium aluminum silicate - blue-green variety of Microcline)

Blue Quartzite (Dyed)

Silicon Dioxide (SiO2) with inclusions

Gemstone Sand (Mineral Assortment)

Mixed Mineral Concentrates (Commonly including Quartz SiO2, Garnet X3Y2(SiO4)3, and Tourmaline (Na,Ca)(Li,Mg,Al)3(Al,Fe,Mn)6(BO3)3(Si6O18)(OH,F)4)

Gneiss (specifically a Granitic Gneiss)

Gneiss (Composition: Quartz, Feldspar, Mica)

Gneiss

Gneiss (High-grade metamorphic rock)

Tiger's Eye (Brown/Dark variety)

Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)

Muscovite Mica (in Quartz matrix)

Potassium aluminum silicate hydroxide fluoride (KAl2(AlSi3O10)(F,OH)2)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)